1. Department of Biosciences, Metapopulation Research Centre; University of Helsinki, P.O. Box 65; 00014 Helsinki Finland
2. School of Biological Sciences; University of Aberdeen; Aberdeen AB24 2TZ U.K.
3. Laboratoire Évolution & Diversité Biologique UMR5174, CNRS, Université Toulouse III Paul Sabatier; 31062 Toulouse France
4. Centre National de la Recherche Scientifique and Université Paul Sabatier Toulouse III, SETE Station d'Ecologie Théorique et Expérimentale, UMR 5321; 09200 Moulis France
5. Department of Evolutionary Biology and Environmental Studies; University of Zurich; CH-8057 Zurich Switzerland
6. Population Genetics, Department of Zoology; Stockholm University; S-10691 Stockholm Sweden
7. Department of Aquatic Ecology; Eawag, Swiss Federal Institute of Aquatic Science and Technology; CH-8600 Dubendorf Switzerland
8. CIBIO-InBIO, Universidade do Porto; 4485-661 Vairão Portugal
9. School of GeoSciences; University of Edinburgh; Edinburgh EH89XP U.K.
10. Museum National d'Histoire Naturelle; Institut Systématique, Evolution, Biodiversité, UMR 7205; F-75005 Paris France
11. Department of Biology; Ghent University; B-9000 Ghent Belgium
12. PSL Research University, CEFE UMR 5175, CNRS, Université de Montpellier, Université Paul-Valéry Montpellier, EPHE, Biogéographie et Ecologie des Vertébrés; 34293 Montpellier France
13. CESCO UMR 7204, Bases écologiques de la conservation, Muséum national d'Histoire naturelle; 75005 Paris France
14. Evolutionary Ecology Group, Department of Biology; University of Antwerp, Universiteitsplein 1; 2610 Wilrijk Belgium
15. Department of Biology; Duke University; Durham NC 27708 U.S.A.
16. NERC Centre for Ecology & Hydrology; Wallingford OX10 8BB U.K.
17. Research Unit of Biodiversity (UO-CSIC-PA), Oviedo University; 33600 Mieres Spain